The Ukrainians’ New Way of War The audacious drone attack deep into Russia’s rear fits a larger pattern of wartime innovation

Christian Caryl,

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In the fall of 2022, Kyiv faced a difficult problem. The Russians were bombarding Ukrainian cities with swarms of Iranian Shahed drones. The challenge was spotting them, since their low altitude, small size, and stealthy design made them hard to follow on radar.

A pair of Ukrainian engineers quickly jury-rigged a solution. Today, the country is blanketed with a network of 9,500 microphones mounted on six-foot-tall poles. 

The microphones, which are attached to cell phones, track the Shaheds by sound (the propeller-driven drones have loud engines) and send that data to a central system that calculates their courses. That information is then passed on to iPad-wielding soldiers in gun trucks that shoot down the slow-moving drones. Each sensor pole in the network costs less than $500—which makes the entire network, known as Sky Fortress, cheaper than a pair of Patriot missiles.